Color televistion system



A. N. GOLDSMITH COLOR TELEVISION SYSTEM 4 Sheets-Sheet 1 Filed Feb. 27,1959 I NV EN TOR. ALFRED N. GOLDSMITH A TTORNEY.

' 1941- A. N. GOLDSMITH 2,253,292

COLOR TELEVISION SYSTEM Filed Feb. 27, 1939 4 Sheets-Sheet 2 i 6 171 7 G(Y ()5; 5/ G52 I QQ55 6 @158 INVENTOR.

ALFRE N. GOLDSMITH ATTORNEY.

Aug. 19, 1941. N, TH' 2,253,292

COLOR TELEVISION SYSTEM Filed Feb. 27, 1939 4 Sheets-:Sheeg 3 J J2 J3sou/v0 AMPLIFIER moumm/z ggg fk I Mom/mm "gig 5 I AA/SM/TTER HIE-VIOLETSYSTEM FOR P RECEIVER Fol? F 2 SYSTEM Y COMPL E TE K/NESCOPE ARRA YRECEIVER Dune/5070M xs'rEM FOR FUR 3 51 l/E-V/OlET M INVENTOR. ALFRE N.GOLDSMITH A TTORNE Y.

1941- A. N. GOLDSMITH COLORVTELEVISION SYSTEM 4 Sheets-Sheet 4 FiledFeb, 27. 1939 A TTORNE Y.

Patented Au 19, 1941 UNITED STATES PATENT OFFICE COLOR TELEVISION SYSTEMAlfred N. Goldsmith, New York, N. Y. Application February 27, 1939,Serial No. 258,593

' Claims.

My invention rel-ates broadly to systems for the transmission andreproduction of television images, and more particularly to a system fortransmitting and reproducing a color television picture on a largescale.

One of the severe disadvantages to which television is at the presenttime subject is the fact that the image is reproduced in comparativelysmall dimensions. Since the public has become accustomed to the viewingof motion pictures which are reproduced on a large screen, there is thepossibility that small images reproduced on a small scale may not befavorably received. Accordingly, it is one of the objects of myinvention to produce a color television picture having a comparativelylarge over-all dimension.

A number of experimenters have attempted to get around the problem ofchanging a small television reproduced imaged into a large image by asingle so-called projection type of kinescope. At the present time, theprojection type of kinescope has not been developed to a point where itis highly practicable in the reproduction of a complete image into animage of considerably larger size. Accordingly, it is another of theobjects of my invention to provide a device wherein reproducedtelevision pictures may be projected notonly in color but alsosatisfactorily projected to form an image of comparatively largedimensions.

Arrangements have been proposed heretofore for reproducing a televisionimage in color by the use of individual color filters which move insynchronism with color filters of a like nature at the transmittingstation, the color filters usually comprising a three primary colorarrangement,

colors passing sequentially between the image to be transmitted and thescanning device. This, of course, entails the use of motors which 'mustbe operated in synchronism in order that the correct color translationmay be made between the reproduced image and the scanned image. The useof such motors always suffers from some disadvantages since the problemof maintaining in synchronism two mechanically rotating elements whichare positioned distantly from each other involves the use of a certainamount of apparatus. Accordingly, it is-another of the objects of myinvention to provide a projection arrangement for reproducing andprojecting tel- .evision pictures in color and in which no movingmechanical elements are involved.

The single projection kinescope has not at the a present time beendeveloped to the degree where ts use is feasible. The light valuesobtained demand the use of very high'voltages and, due to the loss oflight through the projection system, its application is not at thepresent time feasible. Accordingly it is another of the objects of myin-= vention to provide a multiple or multi-color array 1 turereproducing kinesoopes, it is necessary that each component picture bereproduced in. its natural colors or the close simulation thereof.- If,for instance, the composite projected image comprises nine individualsectional areas, then each of the sectional areas has to be reproducedindividually and in color. Accordingly, an array, of individualkinescopes is used, each to produce a sectional area. There will,therefore, have to be as many arrays of kinescopes as there are colorsto be reproduced. Accordingly, it is another of the objects of myinvention to provide an arrangement wherein each array of kinescopescorresponds to a given primary color.

The projection of a number of individual areas each of which forms apart of the complete image must be done in a fashion whereby thecomplete image does not give the effect of being broken down intoindividual sectionalized images. Accordingly, it is another of theobjects of my invention to project either by simultaneous or sequentialprojection of the corresponding area of a complete picture screen anumber or? primary colored component or partial pictures in accuratesuperimposition or registration.

In rsum, the objects of my invention are:

1. To produce a color television picture of large dimensions.

2. To provide a projected color television picture.

3. To provide a projection arrangement tor projecting color televisionpictures in which no moving mechanical parts are involved.

4. To provide a multiple or multi-color array of projection kinescopesfor the projection of component or partial pictures which, incombination, produce the complete picture.

5. To provide an arrangement in which each array corresponds to a givenprimary color.

6. To project either by simultaneous or sequential projection on thecorresponding area of a complete picture screen a number of primarycolored component pictures in accurate superimposition or registration.

There has heretofore been proposed by applicent a system in which anarray or individual kinescopes is used for the projection of sectionalareas of a picture, which when superimposed accurately form a completeimage. This has been shown both for black and white images and for colorimages, and reference should be had to my co-pending applications SerialNumber 124,434, filed February 6, 1937, and Serial Number 235,- 557,filed October 18, 1938.

The basis of the color production in the present method is the fact thatin the human eye and brain, all colors can be substantially duplicatedby the addition, in correct proportions of a group of primary colors. Ingeneral, it is believed that there are three primary colors; namely,red, green, and violet-blue, in accordance with the observations ofHelmholtz, Koenig, Abney and other early investigators in this field. Onthe other hand, there are others; namely, Zander, and Ladd-Franklin whohave believed that there are four primary colors; namely, red, yellow,green and blue. For the purposes of illustration, a tricolor descriptionis used although it should be understood that the method shown will beequally applicable to a four-color process or a two-color process for alimited range of colors, and it should be understood that I do not inany way limit myself to the tri-color process. In general, my apparatuscomprises kinescope arrays having three horizontal rows and threevertical rows of kinescopes purely for the purposes of illustration. Itwill be understood that I do not in any sense limit myself to theparticular number of kinescope arrays.

At the transmitting station, it is necessary to have a color pick-upwith suitable color separation wherein the light from the object to betelevised in its original colors may be broken down into its primarycolor components. The transmitting pick-up may therefore be carried onby scanning the scene sequentially through the three primary colorfilters with such rapidity that color fringes such as action fringes,and color flicker are avoided. For example, in a first case, thescanning rate may be tripled so that each component primary colorpicture is scanned in one-third the time required for black and whitescanning. When this is done, the amount of intelligence to be carried onthe television channel is tripled, thusgiving rise to a need for atransmission frequency channel of triple width. Alternatively, in asecond case, the light picked up by the objective lens at thetransmitter may be split up by well known means into three beams, eachof which passes through an appropriate primary color filter to its ownscanning system which may be, for instance, an iconoscope, and theiconoscope should be suitably color sensitive. The output of eachiconoscope is then a video frequency signal which may be used to controlthe modulation either of a separate carrier frequency, or a singlecarrier may be used with appropriate multiplexing with modulation byeach of the component-color signals.

The signals are received at the receiver, and in the case of a threeprimary color type of reproduction, the signal corresponding to a givenprimary color is then impressed on the array of kinescopes whichreproduce on their screen the image corresponding in intensity to thatparticular color value of the image which is televised. The latter maybe done by time selection of the component-color signals in the firstcase mentioned above. or by multiplex reception as usual in the secondcase mentioned above. Accordingly, with accurate superimposition of theimages formed on each of the kinescope arrays, the picture'is reproducedwithout the aid of moving color filters into a large size natural colorreproduction.

My invention will best be understood by reference to the figures inwhich:

Fig. 1 shows a sectionalized black and white reproducing system,

Fig. 2 shows exemplary tri-color reproducing system,

Fig. 3 is a more detailed view of one of the sectional color reproducersof Fig. 2,

Fig. 4 is an explanatory curve,

Figs. 5 through 10-show various ways of arranging the kinescopesreproducing a sectional area; and

Fig. 11 shows the superimposition of a number of sectional areas fromindividual iconoscopes,

Fig. 12 is an explanatory curve,

Fig. 13 is a schematic diagram of a transmission arrangement forsequential transmission of three colors.

Fig. 1415 a schematic diagram of a transmission arrangement forsimultaneous transmission of three colors, and- Fig. 15 is a schematicarrangement showing the reception of either the simultaneous orsequential transmission.

Referring to Fig. 1, there is shown a schematic plan view of an array ofkinescopes and their projection lenses arranged for black and whitepictures in accordance with applicant's co-pending applications SerialNumber 124,434, filed February 6, 1937, and Serial Number 235,557, filedOctober 18, 1938. A sectional area reproduced by each of the kinescopetubes has been shown as a square. The kinescope tubes I through 9 havebeen illustrated with their appurtenant projection lenses l0 through I8.The area ABFE, for instance, would be I produced by the kinescope Ithrough projection lens Ill. The showing made herein is made for thepurposes of illustration only, and naturally in order to obtain such anarea as ABF'E, it would be necessary to use a masking device (notillustrated) between the screen of tube I and the screen on which theentire image was reproduced. This arrangement forms the foundation forthe showing of Fig. 2 wherein similar reproduced sections areillustrated by the same characters as in Fig. 1.

For purposes of illustration only, one portion of the sectionalizedreproduced image will be explained in view of the fact that thereproduction of each individual area is substantially the same; forinstance, the reproduction in color of the area BCGF will be exactly thesame as the reproduction in color of the area ABF'E. For purposes ofillustration, the tri-color process is shown in this figure, that is tosay, that three primary, colors are reproduced to make the completecolor image. In this figure, kinescopes 20, 2| and 22 are illustratedwith appurtenant projection lenses 23, 24 and 25. Each of the kinescopeswill reproduce a primary color of the picture, and since the kinescopesare displaced with respect to each other, the projection lenses aredisplaced from a coaxial position with the associated kinescope in orderthat the reproduced section will come into accurate registration on thescreen. For example, the kinescope 20 may be so constructed that thelight projected from this kinescope to the screen is red. The kinescope2| would produce the same section of the image While the video signalscorresponding to a complete picture are received, they must ofthemselves be sectionalized or separated in order that each kinescopemay produce only an area which contributes to a compositaand completepicture. The method of so doing does not form a part of the presentapplication since this has been disclosed in my copending application-Serial Number 235,557, filed October 18, 1938. Accordingly, thekinesoope 20 would receive a portion of the complete red signal, thekinescope 26 would receive another portion, and the kinescope 21 wouldreceive another still further portion, the complete signal beingdistributed to similarly located kinescopes ineach of the nine areas ofthe partial pictures illustrated.

Referring to Fig. 3, there is shown the particular arrangement of thethree kinescopes reproducing one of the sectionalized or partial pictureareas (for instance, ABFE) as illustrated in Fig. 2. Kinescopes 30, tiand 32 are illustrated, and it will be appreciated that each kinescopereproduces a primary color for the same section of the picture. Amasking member whose aperture is illustrated as 33 is interposed betweenthe kinesoope 30 and the screen on which the image is projected.Similarly, the aperture 3 6 of the mask associated with kinescope 3| isillustrated, and the aperture 35 or the mask associated with thekinescope 32 is illustrated. Interposed between the projection screenand the kinescope 30 is its associated projection lens 36, and this lensis preferably but not necessarily interposed between the mask whoseaperture is 33 and the projected picture. The masks may be formed of onepiece of material illustrated as 31, and the apertures may be formed inthe single piece of masking material. Joined to the mask is three armmembers 38, 39 and 40 which in this illustration separate the kinescopes30, 3! and 32 respectively. These bail'ies or shields are provided toprevent portions of the light beam from one kinescope screen reachingthe other projection lenses. Such shields as illustrated here preventlight interaction between the various kinescpes.' Any other equivalentform of shielding may be used.

Referring to Fig. 4, there is shown an explanatory diagram. Whilethemethod of color teles vision of this disclosure involves the use of atriple array of kinescopes and, therefore, three for this saving is thateach kinescope need pro duce a fluorescent picture only of a coloragreeing fairly well with that of the corresponding primary colorfilter. In Fig. 4 is shown (not quantitatively but purely schematically)a set of light transmission curves for the three selected primary colorfilters. If the corresponding spec tral emission curves of therespective kinescopes are fairly close to curves 40, M, 42; 43. M, 45;and 46, 41, 48, it is evident that little light is absorbed by eachfilter and, therefore, a minimum of useless light will be produced byeach kinescope screenfand the electrical efllciency in 3 lightproduction of the triple array will not be markedly dlflerent from thator a single array producing a black and white picture. In fact, the

condition may be even more favorable with respect to the tri-color arrayemciency since it has been found that the light emitting eiiiciency o!fluorescing substances which give a substantially white fluorescence isnotably lower than that of some substanceswhich emit within a morelimited spectral range. In consequence of the fore-- going, it may provepracticable to use kinescopes or reduced size and input in the triplearray as compared with those used'in the corresponding black and whitearray. 1

The time of fluorescence decay in each of the primary color kinescopesshould be such that the contributed component picture lasts at leastuntil the scanning of the next component picture of the same primarycolor begins. The degree of time overlapping, if any, between theoutgoing and the incoming pictures can be determined best experimentallysince it depends in part upon persistence of color vision by the eye. Itwill be a compromise between blurring of the picture due to too long atime of decay and color flicker resulting from too short a time ofdecay.

The process up to this point is then, in general terms, thsjfollowing:

1. Color separation of the scanned scene is accomplished at thetransmitting station by simultaneous primary color scanning or byscquential primary color scanning.

2. Each of the primary color picture signals is transmitted either onthe same carrier by multiplex methods or on individual carriers.

3. The primary color picture signals are received and separated eitherby time-division or by frequency-selection methods.

4. A multiple-array of kinescopes is arranged, consisting of an array ofcomponent-picture kinescopes for each primary color contribution to thecomplete picture. g

5. Each kinescope efficiently contributes its primary color componentpicture (preferablmbut pick-up light leakage to the complete picturescreen.

Whereas, in Fig. 2, the primary color componentpicture kinescopes ineach section of the array are arranged at the vertlces of an equilateraltriangle, any other convenient arrangement may be alternatively used.Thus, in Figs; 5 through 10 are shown'other arrangements. It will beassumed for illustration that the transmission consists of threeseparate carriers, each modulated according to a single primary colorpicture, and that these three carriers are separately received anddemodulated, the corresponding primary color picture video frequencysignals being applied according to the methods of copending patentapplication Serial Number 124,434, filed February 6, 1937, to thecorresponding primarycolor array of kinescopes. In effect,

we then have three independently operating but associated largescreentelevision receivers producing complete registered pictures of differentprimary colors on the; same large screen. This illustration has beenselected for purposes of simplification, and also because it illustratesfully the particular aspects of the invention given below.

It should be noted that the optical axis of the primary color componentpicture objective will not pass through the center of the resultingcomponent picture area on the large screen nor through the center of thekinescope screen picture (except in the case where one of thecomponent-picture primary color kinescopes is placed so that the linefrom the center of the screen picture to the center of the kinescopepicture is normal to both; a placement that can occur at most for one ofthe three tri-color kinescopes in each section of the array). jectivemust be of such dimensions and optical Therefore, the obdesign thatspherical aberration, distortion, coma,

and undue reduction in picture brightness toward the edges of thecomponent-picture areas shall not occur. That is anobjective having alarger area of reasonably uniformly illuminated and undistorted sharpfield than would otherwise be required will be needed for the purpose.

It should also be noted that (unless the axis of the objective lenses ofa particular kinescope does happen to pass through the center of thecomponent picture area on the large screen, an effect which can at mostoccur for more than one-third of the objectives) an optical correctionto secure a suitably centered picture is necessary by the use of thefollowing expedient.

The primary-color component picture kinescopes are operated at normalvertical and horizontal negative deflection biases and with normaldeflection control voltages or currents, as the case may be. There willthus be produced on each kinescope screen a centered (and appropriatelymasked) component'or partial picture in each case. But it will then benecessary to displace each objective lens so that its axis is notcentered on the corresponding kinescope screen component picture, and tothe extent necessary to get registration on the large screen. We havethen a physical (optical) displacement, parallel to the large screen, ofthe optical axes of the opjectives in relation to the center of thefluorescent screens of the primary color component picture kinescopesand toward the center of the corresponding large screen componentpicture, and to such extent as to secure registration of the componentpicture on the large screen. (It may also be added that, if this werenot done, there would be areas along th edges of the large screen whichwould be unusable because of the absence of one or more of the primarycolor component area pictures, unless additional and otherwiseunnecessary edge-kinescopes were provided to fill these otherwiseunfilled areas on the large screen). The displacement of the objectivesis shown in'the side view of Fig. 11, the latter corresponding to Fig.8.

Referring to Fig. 5, there is shown the grouping of three kinescopes 50,5| and 52, each of the kinescopes furnishing a primary color image forthe same sectional area of the picture.

Fig. 6 shows a still further alternative arrangement with kinescopes 53,54 and 55.

Fig. 'I shows a still different arrangement for three kinescopes 56, 51and 58.

Fig. 8 shows a still further arrangement for the three kinescopes 60, 6|and 62.

Fig. 9 is a still further arrangement for kinescopes 63, 64 and 65, and

Fig. 10 is still a further arrangement for kinescopes 66, 61 and 68.

Referring to Fig. 11, there is shown the manner in which three'kinescopes such as arranged in Fig. 8, for example, may each projectthe color component picture fora sectional area of the complete picture.Kinescopes Ill might, for instance, reproduce the red component of thesectional areaone side of which would be bounded by RS. Appropriatemasking means, such as H- lustrated at H, would be furnished in order tomake the section reproduced square or rectangular in nature. interposedbetween the mask-v ing means and the screen 12 would be the projectionlens 13. In view of the size or volume of the kinescope and the physicalproblems concerned, the kinescopes naturally could not each project onthe same area and b arranged coaxially. Therefore, the lens 13 must beoffset with respect to the face 14 of kinescope 10. The center points ofthe kinescope, the projection lens and the sectional or partial-picturearea 12 should form a straight line, as illustrated by the line 16, andit is necessary that the projection lens 13 be offset with respect tothe center on the screen of the cathode ray tube in order to accomplishthis result. Kinescope 80 has its associated masking means 8| andprojection lens 82, and kinescope 90 has its associated masking means 9|and its ofiset projection lens 92. It should be understood that thecenter of the projection lens referred to hereinbefore refers to theoptical center of the lens.

Referring to Fig. 12, there is shown an explanatory curve showing howtransmission may be accomplished either sequentially or simultaneously,and the relative bands necessary. F1 would be the band occupied by atransmitter transmtting, for instance, the red component of the opticalvalue. F2 would represent the green component of the optical image whichis transmitted and might be transmitted on a band inimediately adjacentthat covered by F1. Similarly, Fa would represent the band covered bythe transmission of the blue-violet component of the picture, and thesound accompanying the optical image might occupy a band immediatelyadjacent and relatively narrowly separated from 'mitting tube H whichmay be of the type known as an iconoscope. The color filter I2 is, inthis illustration, a three color disc arrangement such as disclosed inmy copending application Serial Number 235,557, filed October 18, 1938.The signals thus generated are representative of the color components ofthe object and the developed signals are passed to an amplifyingarrangement l5. In view of the fact that sequential transmission of thecomplete frame of the object or picture in its color components isdesired, there wer used three transmitters, each of which transmits onlythe image representative of a particular color. Accordingly, thecommutating arrangement must be used so that the signals developed inthe tube It may be transmitted by the proper transmitter. This 'is donein the following manner: The shaft, which drives the color filter l2,may Pass into a gear box It along the optical path It, for instance,traverses,

- tact with a brush member I8 which is connected to the output ofamplifier i5. Three slip rings i9, 20 and 2| are provided, and each slipring is connected to one of the segments l l, l1 and II" respectively. Aconducting brush is provided for each slip ring, and currents passingthrough the brush are fed to the proper modulator and transmitter as,for instance, the brush joining the conductor 22 connects to the slipring l9; and

when the brush i8 is in contact with the segment l1, currents will passto the modulator joined to the red transmitter. It will be appreciated,of course, that the segments H, H and ii" are initially positioned sothat'the member it contacts the segment I! when the red section of thefilter i2 is interposed between the object it and the mosaic i3. Theaction is the same for the ring joined to themodulator for thetransmitter for green and the transmitter for blue-violet respectively.

Referring to Fig. 14, there is shown an arrangement for the simultaneoustransmission of a picture in three component colors, the colors hereillustrated being the same as in the previone figure and, forillustrative purposes, are red. green and blue-violet. An object It ispassed through a lens member ll onto a half silvered mirror l2 which, inits preferable arrangement, is a half sllvered rhomb. For purposes ofconvenience, the optical path in earth case has been indicated by adotted line until the optical view impinges upon a photoelectric member.The view then divides along two optical paths, and one of these paths isillustrated as l3. This view passes through a filter member M, anauxiliary lens in, and impinges onto the photoelectric mosaic it of atransmitting tube I1, the output of which is fed to an amplifier I8, andthence to a modulator i9, and thence to a transmitter 20.

The view which follows the path 2! passes into a second half silveredmirror arrangement. or in the preferable arrangement a half silveredrhomb, and again passes along two divided optical paths 22 and 23. Theview passing along the optical path 23 passes througha color filter it,an auxiliary lens 25, and impinges onto the mosaic 26 of a secondtransmitting tube 21. the signals thus developed being passed to anamplifier 28 and thence to a modulator 29 and to a transmitter 30.

The view that follows the optical path 22 passes through a third filter3|, thence throu h an auxiliary lens 32, and impinges onto thephotoelectric mosaic 33 of a third transmittin tube 34, the signals thusdeveloped being passed to an amplifier 35 and thence to a modulator 36.and being transmitted by means of transmitter 31. It should beappreciated that for the best results the optical paths by means ofwhich the view is impressed through different color filters onto thephotoelectric mosaic of the three transmitting tubes should besubstantially the same, that is to say, the air equivalent paths shouldbe equal.

This has been illustrated by means of letters, and it will be seen thatthe. view that passes centrally a distance is then reflected and passescentrally through a second distance in glass equal to 2 and thence alongan air path through an auxiliary lens until it impinges upon thephotoelectric mosaic It. The image that passes along the optical paths2| and 23 passes through a distance equal to X1+X2 in glass +Xa-l-X4 inglass, if we assume the mirrorto be placed on a 45 angle, plus an airpath to the photoelectric mosaic 26. Accordingly, itwill be realizedthat the distance 2% plus the air equivalent oi the distance X4, plusthe distance from X; to the photoelectric mosaic 26 should be equal tothe air path from where the image emerges from the half silvered rhombmember i 2 to the photoelectric mosaic l6. Similarly, the image thatpasses along the optical path 22 should have the distance X3 plus theair equivalent of X4 plus the distance K5 equal to the distance betweenthe plane of emergence of the image from the rhomb l2 along the opticalline i 3 through the photoelectric mosaic it.

It should, also be appreciated that the color filters M, 25 and 3| areeach differing color filters as, for instance, the filter it might bered,-the filter 25 might be green, and-the filter 3| might beblue-violet.

Referring to Fig. 15, there is shown schematically a receivingarrangement for either the simultaneous or the sequential transmissionsystem. Signals received from the transmitter whose band is F1 arepassed through a distributor system which properly distributes thesignals to the iconoscopes which reproduce the individual red areas,Signals from transmitter whose ban-d is represented by F2 in Fig. 12,are passed through the distributor 16 for the green signals and thus tothe array of the iconoscopes which reproduce the individual image areasin green. Similarly a receiver is provided for signals from thetransmitter whose band isrepresented by F3 in Fig. 12, and thencethrough a distributor system to the iconoscopes which reproduce theblue-violet color. Reference should be had to my copending application,Serial Number 235,557, filed October 13, 1938, for the actualdistributor arrangement. Since the distributor arrangement per se is nota part of this invention, a schematic showing is provided. Of course, itwill be reali'zed that in actual practice the kinescopes marked R, thosemarked G, and those marked B would be arranged with one kinescope forrepro duping red, one for reproducing blue-violet, and one forreproducing green arranged in a fashion as illustrated in the area ABFEof Fig. 2.

What I claim is:

1. A color television system comprising means for sequentially scanningand developing signals representative of the color components of anoptical image to be reproduced, means for trans- 'mitting said signals,means for receiving said signals, a plurality of independent reproducingmeans for reconstructing substantially the same sectional area of thetransmitted image in a different primary color, and means for projectataneously reconstructing substantially the same sectional area of thetransmitted image, each of said reproducing devices being adapted toreconstruct one primary color image, and means for projecting saidreproduced sectional-area images as juxtaposed bi-dimensional partialimage areas to form a composite color reproduction.

5. Apparatus in accordance with claim 4 wherein said plurality ofindependent reproducing means each comprise three cathode ray devices.

W 6. Apparatus in accordance with claim 4 wherein said plurality ofindependent reproducing means each comprise {our cathode ray devices.

7. The method of transmitting and reproducing in color an optical imageto be televised. which comprises the steps of scaning the imagesequentially to develop signals representative of the primary colorcomponents of the picture, and reproducing sectionalized areas of eachcomplete image in a single color, and sequentially reproducing thecomplete picture in each color by means of the juxtaposition of theindividual bi-dimensional sectionalized areas.

8. The method of. transmitting and reproducing in color an optical imageto be televised which comprises the steps of scanning said image tosimultaneously develop independent signals representative of the primarycolor components of said image, and simultaneously reproducingsubstantially the same sectionalized area of said picture in a pluralityof primary colors and projecting said reproduced colored sectionalizedareas to form a composite color picture by juxtaposition of thebi-dimensional sectionalized areas.

9. A color television system comprising a plurality of scanning means,means for impressing an image representation of a particular colorcomponent of said image onto each of said scanning means, the colorimages on each of said scanning means being different, a plurality ofsignal transmission channel's, means for impressing the signalsdeveloped on each of said plurality of said scanning means onto adifferent nels, and a plurality of groups of reproduc-' ing means forreconstructing the optical image, each of said groups being energizedfrom the signals developed in one of said transmission channels, eachgroup being adapted ity of cathode ray tubes each or which reproduces abi-dimensional sectionalized juxtaposable partial image area of thecomplete optical image.

10. Apparatus in accordance with claim 9 wherein means are provided formasking each of the cathode ray tubes from the. tubes to prevent lightinteraction.

11. Apparatus in accordance with claim 1 wherein means are provided formasking each of the independent reproducing means from the otherreproducing means.

12. Apparatus in accordance with claim 4 wherein means are provided formasking each of the independent reproducing means from the otherreproducing means.

13. A television reproducer for reproducing color television picturesfrom signals representative of the color components of an optical imageto be reproduced, comprising means for receiving said signals, aplurality of independent reproducing means for reconstructingsubstantially the same sectional area of the transmitted image in adiiferent primary color, and means forprojecting said reproducedsectional image areas as juxtaposed bi-dimensional partial image areasto form a composite color reproduction.

14. A television reproducer for reproducing color television picturesfrom signals representative of the color components of an optical imagevices being adapted to recontruct one primary color image, and means forprojecting said reproduced sectional area images as juxtaposedbi-dimensional partial image areas to form a composite colorreproduction.

15. The method of reproducing in color optical images which have beentelevised and transmitted in the form of signals representative of thecolor components of the optical image, comprising the steps ofreproducing sectionalized areas of each complete image in a single colorand sequentially reproducing at least a portion of the complete opticalimage in each color by means of the juxtaposition of the individualbidimensional sectionalized areas,

ALFRED N. GOLDSMITH.

